Description
The AN503-8-6 is a genuine Textron Aviation screw — a fastening or retaining hardware item used in the airframe. It is fitted to the 1900 Airliner, 1900C Airliner, 1900D Airliner, Baron Series B55, E55, 58 or G58, Bonanza 36, Bonanza F33, G33, F33A or F33C, Citation III, VI or VII, King Air 100, King Air B200, B200T, B200C or B200CT, and King Air B200GT, among other compatible variants. It carries an export classification of ECCN EAR99.
Because the AN503-8-6 is an original-equipment (OEM) part sourced directly from Textron Aviation, it matches the exact specification and placement called out in the aircraft's type design and maintenance data — assurance a generic substitute cannot offer.
Because the Beechcraft 1900, Beechcraft Baron, Beechcraft Bonanza, Cessna Citation, and Beechcraft King Air aircraft share extensive structure and hardware, a single part like this is often common across several variants.
Strength grade and finish define aircraft hardware, so matching the specified part keeps the joint as designed. Genuine sourcing means the part matches the drawing exactly, so fit and function are known quantities rather than a gamble at installation.
Both the Cessna and Beechcraft lines are supported today by Textron Aviation, formed in 2014 to unite the two historic Wichita manufacturers with Hawker. The Beechcraft 1900, a 19-passenger regional airliner derived from the King Air, was produced from 1982 to 2002 and still serves commuter and cargo operators worldwide.
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